Improvement in combined chimney top and ventilator



UNITED STATES PATENT OFFICE.

JOSEPH HARMON, OF DEOORAH, IOWA.

IMPROVEMENT IN COMBINED CHIMNEY TOP AND VENTILATOR.

Specification forming part of Letters Patent No- 183,300, dated October17, 1876; application filed August 28, 1876.

To all whom "it may concern Be it known that I, JosEPn HARMON, ofDecorah, in the county of Winneshiek and State of Iowa, have invented anew and Improved Gombined Chimney Top and Ventilator, of which thefollowing is a specification:

In the accompanying drawing, Figure 1 represents a vertical centralsection on line 0 c, Fig. 2, of my improved chimney top and ventilatorcombined; and Fig. 2 is a horizontal section of the same on line a: a,Fig. 1.

Similar letters of reference indicate corresponding parts.

The invention relates to improvements in combined chimney tops andventilators, by which the ventilation is efl'ectively. kept up, evenwhen the chimney is not heated, by the draft established in thechimney-top by the action of the outer air; and the invention consistsof a ventilating-tube that surrounds the chimney, and is enlarged at thechimneytop, the enlarged part being connected by draft-apertures at thebottom of the enlarged part, and at the sides of the base with the outerair, to draw the air drawn up to and out at the exit-openings of the topcap-piece.

1n the drawing, A represents a detachable chimney or smoke flue, that iscovered at its top by a conical cap, and provided with a suitable damperfor being opened or closed. The ventilating-tube B surrounds thesmokeflue, and forms an enlarged part, B, above the base 0 of thechimney-top',-the enlarged part B having exit-openings at the top, whichare protected by a cap, 1), near the upper end of the smoke-flue. Thebottom of the enlarged part B is provided with apertures a, thatcommunicate with the base 0 of the chimney-top, and with side aperturesb of the same. The side apertures b are protected by hood-shaped flangesd, to prevent the rain, snow, &c., from entering at the base. Theoutside air passes through the side and bottom apertures into theenlarged space E, and out at the top, creating thereby a draft thatproduces a partial vacuum in the ventilatingtube, and thereby acontinuous ventilation of the building, whether the smoke-flue is heatedup or not.

In one case the draft created in the chimney-top assists the draftproduced by the heated smoke-flue, While in the other case it continuesthe ventilation, which would be interrupted when the smoke-flue is notheated. Thus a reliable and uniform method of ventilating buildings byvery simple means is obtained, with little additional expense over thecommon chimney tops and ventilators.

Having thus described my invention, I claim as new and desire to secureby Letters Pat ent- The combination, with a chimney smokefiue,iA, of asurrounding ventilating-tube, B, provided with an enlarged top part, B,with exit-openings and cap above the base of the chimney-top, the toppart B communicating by bottom apertures a and side apertures b of thebase of the chimney top with the exitopenings, to create an air-draft inthe ventilating-tube. substantially in the manner and for the purposeset forth.

. JOSEPH HARMON.

Witnesses:

Gno. W. ADAMS, JOHN MEAGHER.

